diff --git a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
index 590ee5e6a3a7a..a16b68e406105 100644
--- a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -344,6 +344,10 @@ if (current_toolchain == default_toolchain) {
       "__debug",
       "__debug_utils/randomize_range.h",
       "__errc",
+      "__expected/bad_expected_access.h",
+      "__expected/expected.h",
+      "__expected/unexpect.h",
+      "__expected/unexpected.h",
       "__filesystem/copy_options.h",
       "__filesystem/directory_entry.h",
       "__filesystem/directory_iterator.h",